Being the biggest instance and having defederated with a couple of instances has made us a target.

This is a quote from L.W.AdmiS' post :
Lemmy World outages

At the time I made my first comment in here, there was no word from any admin, so, I had that (hypothesis //hunch //educated_guess) whatever you may call it. And then I wrote : "time will tell". Well, I had the confirmation I needed for that L.W.Admin.

Finally, if you need some more information, you may search it by yourself - - I have nothing more to say.